Added all code from gitdb to gitpython. Next is to make it generally work. Then the tests will need some work

1 files changed, 38 insertions, 0 deletions

diff --git a/git/refs/tag.py b/git/refs/tag.py
index 47c9ea4d..24a8e768 100644
--- a/git/refs/tag.py
+++ b/git/refs/tag.py
@@ -3,7 +3,45 @@ from gitdb.ref.tag import TagReference as GitDB_TagReference
 __all__ = ["TagReference", "Tag"]
 
 class TagReference(GitDB_TagReference):
+	"""Class representing a lightweight tag reference which either points to a commit 
+	,a tag object or any other object. In the latter case additional information, 
+	like the signature or the tag-creator, is available.
+	
+	This tag object will always point to a commit object, but may carray additional
+	information in a tag object::
+	
+	 tagref = TagReference.list_items(repo)[0]
+	 print tagref.commit.message
+	 if tagref.tag is not None:
+		print tagref.tag.message"""
 	__slots__ = tuple()
+	_common_path_default = "refs/tags"
+	
+	@property
+	def commit(self):
+		""":return: Commit object the tag ref points to"""
+		obj = self.object
+		if obj.type == "commit":
+			return obj
+		elif obj.type == "tag":
+			# it is a tag object which carries the commit as an object - we can point to anything
+			return obj.object
+		else:
+			raise ValueError( "Tag %s points to a Blob or Tree - have never seen that before" % self )	
+
+	@property
+	def tag(self):
+		"""
+		:return: Tag object this tag ref points to or None in case 
+			we are a light weight tag"""
+		obj = self.object
+		if obj.type == "tag":
+			return obj
+		return None
+		
+	# make object read-only
+	# It should be reasonably hard to adjust an existing tag
+	object = property(Reference._get_object)
 	
 	@classmethod
 	def create(cls, repo, path, ref='HEAD', message=None, force=False, **kwargs):